[Rongqi P]

Dear Foamers,

I wanted to simulate the case that CH4 leakage in the air on OpenFOAM 9, but I didn't want to involve combustion and chemical reactions, so I entered "active off" in "combustionProperties" to try to turn off combustion, but the calculation still resulted in the combustion reaction.
I would like to ask for your help.


/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 9
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
format ascii;
class dictionary;
location "constant";
object combustionProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

combustionModel infinitelyFastChemistry;

active off;

infinitelyFastChemistryCoeffs
{
semiImplicit no;
C 5.0;
}

[dlahaye]

The Sandia-D tutorial switches combustion off in initial stage of computations. Have a look at the Allrun script.

[Rongqi P]

Thanks for your patience！
For the Sandia-D case, I have tried to turn the combustion off and it's work according to the post (How to switch off combustion and reaction in reactingFoam).
Sandia-D case is based on reactingFoam, but my case is based on buoyantReactingFoam. Their difference is that the buoyantReactingFoam case does not have the file "chemistryProperties" in the "constant" folder. So I don't know how to turn off the chemical reaction. Because if I just turn off the combustion and reaction in the "combustionProperties" and "reaction" respective, it will still report an error.

The error is as follows：

--> FOAM FATAL ERROR:

lookup of combustionProperties from objectRegistry region0 successful
but it is not a combustionModel, it is a none

From function const Type& Foam:bjectRegistry::lookupObject(const Foam::word&) const [with Type = Foam::combustionModels::singleStepCombustion]
in file /home/prq/OpenFOAM/OpenFOAM-9/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 178.

FOAM aborting

[dlahaye]

what if you create a constant/chemistryProperties file?